HardLabs

Helios

w4kpm·Helios·KiCad/Helios.kicad_pcb

Helios PCB layout, top view — open source STM32 board by w4kpm

About the Helios PCB

Helios is an open source STM32 PCB design by w4kpm, published on GitHub. It is a 2-layer board measuring 99.5 × 91.2 mm, with 77 components from 28 distinct parts.

Its main chip is the STM32F303V(B-C)Tx_u, from the STM32 family. Other key parts include the LM78l33_TO220, SN65HV7X and MAX31865. By type, the board carries 25 capacitors, 16 resistors, 9 connectors, 9 diodes, 8 ICs and 5 fuses.

Main components on the Helios

LM78l33_TO220STM32F303V(B-C)Tx_uSN65HV7XMAX31865

Helios bill of materials (BOM)

77 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM78l33_TO220
U1
1
STM32F303V(B-C)Tx_u
U2
1
SN65HV7X
U3
5
MAX31865
U4, U5, U6, U7, U8
1
Q_NMOS_GDS
Q1
1
AVR-JTAG-10
CON1
1
CONN_01X10
Conn_01x04
J1
1
CONN_01X12
Conn_01x04
J2
1
Conn_01x04
J3
3
Conn_01x04
J4, J5, J6
1
Conn_02x10_Counter_Clockwise
J7
1
Conn_01x06
J8
5
Polyfuse_Small
F1, F2, F3, F4, F5
2
Varistor
RV1, RV2
2
SW_DPDT_x2
SW1, SW2
8
D_Schottky
D1, D2, D4, D5, D6, D7, D8, D9
1
D_TVS_x2_AAC
D3
1
1UF
100uF
C1
4
1 uF
C2, C4, C6, C8
20
.1 uF
C3, C5, C7, C9, C10, C11, C12, C13 +12
Show 8 more
QtyPartRefs
1
300
0
R1
1
300
TBU
R2
1
TBU
R3
1
9k
R4
2
120
R5, R14
1
1k
R6
4
10k
R7, R13, R15, R16
5
430 .1%
R8, R9, R10, R11, R12

Helios design files

The KiCad project lives in the w4kpm/Helios repository on GitHub; these links point at the commit this page was built from.

Helios: common questions

What microcontroller does the Helios use?

The Helios is built around the STM32F303V(B-C)Tx_u, from the STM32 family.

How big is the Helios PCB?

The Helios measures 99.5 × 91.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Helios?

77 components, from 28 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Helios design files?

From the w4kpm/Helios repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Helios design in my own project?

The repository has no license, so all rights stay with w4kpm. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Helios without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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